Published by:
CGP EDU Academic Team
Published on: August 14, 2026
Study the Ellingham diagram for the formation of some oxides and answer the following questions
(i) At the point of intersection of 
and MgO curves
A
, 
becomes zero for the reaction, 
Above this point magnesium can reduce alumina. Although thermodynamically feasible, Mg is not used for reduction of 
because 
Temperature required is very high Carbon reduces FeO below the temperature at point
becomes zero for the reaction, Above this point magnesium can reduce alumina. Although thermodynamically feasible, Mg is not used for reduction of because Temperature required is very high Carbon reduces FeO below the temperature at point
B
The yield of metal is very low 
Value for overall reduction with CO is zero.
Value for overall reduction with CO is zero.
C
Value of 
becomes positive 
Value for the reaction at point
becomes positive Value for the reaction at point
D
Magnesium is not used as reducing agent for any reaction (ii) For the reduction of FeO with C at the temperature corresponding to , which of the following statements is correct? is positive Below point , for the metal exists in molten state.
Text Solution
Verified by ExpertsThe correct answer is:
A
Ans.
(i) : Temperature above the point of intersection
of 
and MgO causes Mg to reduce 
but the temperature required would be so high that the process is difficult to carry out.
(ii) : 
at the point of
intersection, so 
becomes zero for the overall reaction.
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